Here's an oldie kit upgrade I did for the same client I did the garden scale trains for. This was an obscure resin kit I repainted into "Maintenance of way" yellow, hand lettered, and then did a really fun weathering job to match the real RGS plow. Note the VERY nuanced rust vs. shiny steel on the front plow and flanger beneath the car itself. Apparently the kit is from Durango Press if you wanna build one of your own.
https://midwestmodelrr.com/drp42/ (HO version)
https://wisemanmodelservices.com/O-Scale-On3-On30/On3-On30-MOW-KITS-PLOWS-DITCHERS-FLANGERS-ETC/On3-On30-RIO-GRANDE-SOUTHERN-PLOW-FLANGER (On3/30 version)